Automatic burner for gas-stoves.



G. BRUTON. AUTOMATIC BURNER FOR GAS STOVES.

APPLICATION FILED DEC. 12, 1908.

1,108,861 Patented Aug. 25, 1914; 1291 J 35 W WE Hllm Him Z i I '2 67 24 l j mum,

, 1 gm MIN/l 1% rag 5 THE NORRIS PETERS CO. PII'OTOJJTHO, WASHINGTON, D, C

GEOEGE BRUTON, OF JOLIE'I, ILLINOIS,

ASSIGNOR- TO FRL'EYKLIN L. ROCKEY, OF JULIET,

ILLINOIS.

AUTOMATIC BURNER GAS-STQVES.

Application filed December 12, 1908.

1 "0 all whom 1 25mm, concern:

Be it known that I, GEORGE Bnu'ron, a citizen of the United States, residing in the city of Joliet, in the county of Will. and State of Illinois, have invented a new and useful Improvement in Automatic Burners for Gas-Stoves, of which the following is a specification.

My invention relates to devices of the type shown in my application Serial No. 400514, filed Nov. l, 1907, for automatic burners for gas stoves; and has for some of its objects changes of structure in said prior device that shall make it more simple, more compact, more completely self contained and self supporting, and more readily applied to gas stoves of ordinary construction; and it has for a further object the provision of special means for controlling the pilot light; and it has for still further ob'ects such other improvements in structure or function as may be found to ob tain in the device hereinafter described or claimed.

In the accompanying drawing forming a part of this specification, and in which like reference numerals indicate like parts in all of the figures, Figure 1 is a sectional view of the complete device with the valve in normal closed position; Fig. 2 is a fragmentary sectional view on the line 22 of Fig. 1; Fig. 3 is a sectional view on the line 3-3 of Fig. 1 (the central. plunger being shown in side elevation), but with the valve opened by the placing of a cooking vessel over the burner; Fig. 4 is a fragmentary and partly sectional view, enlarged, of the tip of the pilot tube shown in full in Fig. 3; and Fig. 5 is a vertical sectional view through the valve-stem cap-piece and the top of the 'alve-stem and the base of the plunger, to show more clearly the relation between said plunger and cap-piece and valve-stem.

The gas supply pipe 20, controlled by the stop-cock 21, is screw fitted into the lateral port 22 of, and sustains, the lower half 23 of the valve chamber located centrally under the burner and grid. The upper half 2& of said valve chamber is screw fitted into the top of the said lower half 23, and the two half chambers connected by the port 25 whose lower end is beveled to form the valve seat 26. The automatically operated valve 27, normally seated up against said Specification of Letters Patent.

Patented Au 25, 1914.

Serial No, 487,133.

is secured to the upwardly proeXtends through, the aperture alve seat, jecting valve-stem that and is a close working lit in, 28 in the center of the top of the upper half of the valve chamber. A boss 29, integral with said top of the valve chamber, rises around said aperture and forms a gland in which the valve-stem reciprocates and is guided. The top of the valve stem is a drive fit in and pinned to the cap-piece 30. The lower end of said cap-piece is so beveled, at 31, that when depressed it will be seated in and securely seal the countersunk upper end 32 of the aforesaid boss 29. To prevent intrusion of dirt or soot to interfere with the proper seating of said beveled end of the cap-piece in the countersunk top of the boss, the line of junction of the two parts is protected by the inverted dust guard 33 pinned to the cap-piece, just above said beveled lower end, by the same transverse pin, 34:, that pins the top of the valvestem to said cap-piece. The lower end of the plunger 35 rests directly upon the top of the aforesaid oappiece, and by depressing said cap-piece causes the valve-stem, secured thereto, to be depressed and the valve to be opened, to permit the flow of gas from the lower into the upper half of the valve chamber. As the plunger makes no contact with the top of the valve-stem itself, all excess strain put upon the plunger by the weight of the cooking vessel is directly sustained by the aforesaid cap-piece seated in the boss on the top of the valve chamber, and no sheering strain is put upon the pin that connects the top of the valve-stem with said cap-piece. The upper part of the cap-piece is provided with the flange 36, upon the top of which the forked lower end of the accessory-control lever 37 is adapted to rest, so that said cap-piece may be depressed. and the valve operated by the depression of said accessory lever when the cooking vessel placed on the grid 38 has its bottom of such concave form as to fail to engage the top of the central plunger that would otherwise actuate the valve. The under-side of this ilange 36 is engaged by the forked inner end of the adjustable 105 counter-weighted lever 39 that normally holds the cap-piece of the valve-stem lifted so as to normally retain the valve in closed position when there is no utensil upon the grid, This counter-weighted lever is pivotally mounted in the open slots 40 in the upper edges of the arms 41 projecting I'62tI- ward from the burner bracket 42 that is secured, at 43, to the upper half of the valve chamber. And to convert the device from an automatic to an ordinary burner, under the control of the stop-cock alone, it is only necessary to remove the said counter weighted lever by lifting it out of the said open ended slots in which it is freely pivoted. The arm l-(t extends inwardly from the top of the burner bracket 42, toward the center of the aperture 45 of the burner 46, and is there provided with the cylindrie socket embracing and suaporting the stem of the valve-operating plunger, said plunger being freely inserted in and removable from said socket and thus supported independently of the burner and by the bracket that is rigidly secured to the valve chamher, so that the proper axial. alinelnent of said plunger with the valve is always preserved.

The upper half of the valve chamber is provided with the outlet port 47, located immediately above the inlet port of the lower half of said chamber, and the burner feedpipe 1-8 is screw fitted into said outlet port and leads out for a considerable distance from under the burner and to near the edge of the stove top t9, closely paralleling the gas supply pipe 20. The outer end of this feed pipe 48 has secured to it the up wardly turned elbow 5O surmounted by the inwardly turned elbow 51, the two elbows being mutually joined by the screw-coupler 52 within their adjacent ends. This screw coupler is provided with apassage-way for the flow of gas toward the burner, such passage-way consisting in a relatively small aperture 53 extending through the lower end of the coupler and widening into a cyliudric recess 5 L extended upward through the rest of the coupler. The bottom of this cylindric recess is beveled to form the seat for the ball-valve 56 freely contained within said recess and normally closing the aperture in the bottom of the coupler. This ball-valve and seat constitutes a gravitatively operated check-valve mechanism whose function is to constantly maintain a slight back pressure in the gas flow from the main valve chamber when the automatic valve 27 is open; and the function of this back pressure is to always insure sufhcient gas pressure within the lower half of the valve chamber, 23, to maintain a sufficient constant outflow of gas through the pilot tube 57 that taps said lower half of the valve chamber at 58. l/Vhen the operator reduces the burner flame by turning the stop-cock 21 and reduces the flow of gas through the supply pipe 20, while the burner is ignited, it may happen that, without this backpressureprovision, the pres sure within the lower half of the valve chamber, 23, may fall so low, that not enough gas will continue to flow into the pilot tube to maintain the pilot light, and if the pilot light is thus extinguished and the cooking vessel is then lifted from the grid, the, automatic valve may shut off the burnerv supply, and extinguish the burner flame, before the pilot can be re-ignited, and so a continuing escape of gas through the pilot tube would follow.

The upper or inwardly turned elbowpiece ol is provided with a tip 59 upon which is freely soeketed and supported the air intake member 60 that is secured to the outer end of the burner nozzle 61, the other end of said nozzle being secured, at 62, to the burner itself, The opposite side of said burner rests freely upon the top of the burner bracketthat is secured tothe valve chamber, and is positioned on said braelziet by the stud 63 projecting through the socket 64: in said bracket top. It is thus obvious that the entire burner member, consisting of the burner and its nozzle and air-intake, may be readily removed by sim ply lifting the burnen from the bracket and at thesame'time drawing the air-intake member off of the 'ini'vardly turned tip of the elbow-piece 51. moval, the plunger of the valve device may first be removed, ifth e flared top ofsaid plunger does not happen to be smaller than the central aperture of the burner.

Theflocation of the air-intake member near the edge of the stove facilitates the necessary proper adjustment of the air-intake apertures (35, bythe shifting of the air control 66. The bottom of the air-intake v member is flattened, at 67, to permit said member and the burner nozzle to be brought down closelyparallel to the burner feed pipe intermediate the upper half of the valve chamber and the elbow members that contain the, ball check-valve.

The pilot tube rigidly secured to the lower half of the valve chamber, is additionally supported by the hook piece 68 secured to one side of the lower part of the burner bracket. 'The free end of said pilot tube, curved inward toward the top edge of the burner, is 'providedwith a cylindric hollow tip 69 out of which the'pilot flame is projected toward the burner; and the bottom of'this cylindric tip is pierced, at sev- To facilitate such rei eral radially distributed points, by a series termediate the pilot and the burner;

struction, but I do not limit it thereto, or to less than all the possible forms in which the said invention as hereinafter claimed may be embodied and prior devices for like purposes.

I claim 1-- 1. In a gas-stove burner, in combination: a burner; gas-conduits thereto; an automatically actuated valve controlling the gassupply of said burner; and a pilot-light tube having an enlarged flame-shielding tip provided with twyers for injecting air into the flame; substantially as specified.

2. In a gas-stove burner, in combination: a burner; gas-conduits thereto; an autonutticallyactuated valve controlling the gas-supply of said burner; tube having an enlarged flame-shielding tip of hollow sub-cylindric form and provided with twyers for injecting air into the flame;

substantially as specified.

In a gas-stove burner, in combination: a. burner; gas-conduits thereto; an automatically actuated valve controlling the gas-supply of said burner; and a pilot-light tube having an enlarged flame-shielding tip of hollow subcylindricform and provided near its base with twyers for injecting air into the flame; substantially as specified.

4t. In a gas-stove burner, in combination: a burner; gas-conduits thereto; a pilot-light tapping said conduits; an automatically-actuated valve controlling the gas-supply of said burner and located in said conduits inand a chock-valve in said conduits intermediate the aforesaid automatic valve and the burner, for maintaining adequate back-pressure to insure the feed of the pilot; substantially as specified.

5. In a gas-stove burner in combination: a burner; gas-conduits thereto; a stop-cock controlling said conduits; a pilot-light tapping said conduits intermediate the stopcock and the burner; an automatically actuated valve controlling the gas supply of said burner and located intermediate the pilot and the burner; and a check-valve in said conduits intermediate the aforesaid automatic valve and the burner, for maintaining adequate back-pressure to insure the feed of the pilot; substantially as specified.

6. In a gas-stove burner, in combination: a burner: gas-conduits thereto; a stop-cock controlling said conduits; an airintake in said conduits intermediate the stop-cock and the burner: an automatically actuated valve for controlling the gas-supply of said burner and located in said conduits interme diate said air-intake and the stop eock; a pilot-ligl'it tapping said conduits interme: diate said automatic valve and the stopcock; and a check-valve in said conduits in termediate the aforesaid automa .c valve and said air-intake, for maintaining adedistinguished from and a pilot-light quate back-pressure to insure the feed of. the pilot; substantially as specified.

7. In a gas-stove burner, in combination: a burner; gas-conduits thereto; a pilotlight tube tapping said conduits and having an enlarged flame-shielding tip provided with twyers for injecting air into the flame; an automatically-actuated valve controlling the gas-supply of the aforesaid burner and located in the aforesaid conduits intermediate the pilot and said burner; and a checkvalve in said conduits intermediate said antomatic valve and said burner, for maintaining adequate back-pressure to insure the feed of the pilot; substantially as specified.

8. In a gas-stove burner, in combination: a burner; gas conduits thereto; a valvechamber located centrally under said burner an automatically actuated valve within said chamber and having a valve stem projecting upward through the top thereof; and a cappiece secured to the top of said valve-stein and bearing an upwardly projecting plunger to engage the utensil placed on the burner, said cap-piece being seated on the top of the valvechamber when the plunger is depressed; substantially as specified.

9. In a gas-stove burner, in combination: .a removable burner having a lateral nozzle and an air intake mixing-chamber thereon; a valve-chamber and contained automatically actuated valve located centrally under said burner; and a gasconduit leading laterally out from said valve chamber and having its outer recurved end freely socketed in said burner-nozzle; substantially as specified.

10. In a gas-stove burner, in combination: a removable burner having a lateral nozzle and an air-intake mixing chamber thereon; av valve chamber and contained automatically actuated valve located centrally under said burner; a bracket secured to and projecting up from said valve-chamber and freely supporting said burner; and a gas conduit leading laterally out from said valve chamber and having its outer recurved "end freely socketed in said burner nozzle; substantially as specified.

11. In a gas-stove burner, in combination: a burner; gas-conduits thereto; a valvechamber and contained automatically actuated valve interposed in said gas-conduits; and a counter-weight device for maintaining said valve in normally closed position, said counter-weight device being mounted adjacent the valve-chamber and adapted to be freely lifted away to permit the valve to remain normally open and so eliminate the automatic control of the burner-feed; substantially as specified.

12. In a gas-stove burner, in combination: a burner; a valve-chamber and contained automatically actuated valve located centrally under said burner; a burner-feed convalye in said burnerfeed &

duit extended laterally out from said "valvechamber and recurved toward the burner; a pilot-light tube tapping the gas-supply on the intake side of said Valve; and a checle conduit, for 1nain tai'ning adequate back pressure to insure the feed ofjthe pilot substantially as specified.

In a gas-stove burner, in combination: a burner; a valve-chamber and contained, autoinat'eally actuated Valve located ce ntrally under, said burner; a burner-feed conduit extended laterally out from said valvechamber and recurved toward the burner; a

pilot; substantially as specified.

in testimony whereof I have hereunto set my hand in the presence oi the two subscribing witnesses.

' GEORGE BRUTON. l'Vitnesses i C. WV. BARKER, 1 L. H. EIB.

Copies of patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

en. k A 

